## What is a Container Image { #what-is-a-container-image }

A **container** is run from a **container image**.

A container image is a **static** version of all the files, environment variables, and the default command/program that should be present in a container. **Static** here means that the container **image** is not running, it's not being executed, it's only the packaged files and metadata.

            "name": "Foo",
            "price": 35.4,
            "image": {"url": "http://example.com/image.png"},
        },
    )
    assert response.status_code == 422, response.text
    assert response.json() == {
        "detail": [
            {
                "loc": ["body", "image", "name"],
                "input": {"url": "http://example.com/image.png"},
                "msg": "Field required",

            "${GENERATE_THUMBNAIL}" "image" "file:${TEST_DIR}/400x400.jpg" "${OUTPUT_DIR}/jpg_thumb.png" "image/jpeg"
    fi

    # Test: GIF thumbnail generation
    if [[ -f "${TEST_DIR}/400x400.gif" ]]; then
        run_file_test "GIF thumbnail" "${OUTPUT_DIR}/gif_thumb.png" \
            "${GENERATE_THUMBNAIL}" "image" "file:${TEST_DIR}/400x400.gif" "${OUTPUT_DIR}/gif_thumb.png" "image/gif"
    fi

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      </a>
    </div>
    <div class="item">
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				"chemical/x-xyz",
				"image/x-ms-bmp",
				"image/cgm",
				"image/example",
				"image/fits",
				"image/g3fax",
				"image/gif",
				"image/ief",
				"image/jp2",
				"image/jpeg",
				"image/jpm",
				"image/jpx",
				"image/naplps",
				"image/nitf",
				"image/png",
				"image/prs.btif",
				"image/prs.pti",
				"image/svg+xml",
				"image/t38",

    }

    /**
     * Determines the MIME type of an image file based on its file extension.
     *
     * @param imageFile the image file
     * @return the MIME type string
     */
    protected String getImageMimeType(final File imageFile) {
        final String path = imageFile.getAbsolutePath();
        if (path.endsWith(".png")) {
            return "image/png";
        }
        if (path.endsWith(".gif")) {

        fileTypeHelper.add("text/plain", "text");
        assertEquals("text", fileTypeHelper.get("text/plain"));

        fileTypeHelper.add("image/jpeg", "image");
        assertEquals("image", fileTypeHelper.get("image/jpeg"));
    }

    @Test
    public void test_get() {
        fileTypeHelper.add("application/pdf", "pdf");
        fileTypeHelper.add("text/plain", "text");

  format_hint=""
  case "${mimetype}" in
    "image/gif")  format_hint="gif:" ;;
    "image/tiff") format_hint="tiff:" ;;
    "image/png")  format_hint="png:" ;;
    "image/jpeg") format_hint="jpeg:" ;;
    "image/bmp"|"image/x-windows-bmp"|"image/x-ms-bmp") format_hint="bmp:" ;;
    "image/vnd.adobe.photoshop"|"image/photoshop"|"application/x-photoshop"|"application/photoshop") format_hint="psd:" ;;
  esac

Native Image Tests
==================

This executes OkHttp's test suite inside a Graalvm image.

Execute
-------

The native image runs JUnit 5 tests in the project.

```
./gradlew -PgraalBuild=true --info native-image-tests:nativeTest

    }

    // Test all supported image MIME types in one comprehensive test
    @Test
    public void test_getExtensionFromMimeType_allImageTypes() {
        final String[][] testCases = { { "image/gif", ".gif" }, { "image/tiff", ".tiff" }, { "image/svg+xml", ".svg" },
                { "image/jpeg", ".jpg" }, { "image/png", ".png" }, { "image/bmp", ".bmp" }, { "image/x-windows-bmp", ".bmp" },